http://invest4s7fktaazcihjpa5khar5utw2bl3syf4lawyosp27y2ilsqpyd.onion/rx470-monero/index13.html
Some companies are accepting Ether as a form of payment, including the likes of Microsoft and Intel! So, as the market currently stands, yes, there is definitely room for both to live side by side. Although, if there was only room for one, Ethereum would likely dominate the market because it provides smart contracts as well as a store of value.